%0 Journal Article
%A Yu. V. Egorov
%T On the structure of subelliptic operators
%J Doklady Akademii Nauk
%D 1971
%P 1259-1262
%V 198
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_198_6_a1/
%G ru
%F DAN_1971_198_6_a1